Ukubuka konke kwezinto ze-polyurethane foam: kusukela ku-microstructure kuya ekusebenzeni kwe-macroscopic
Njengenye yezinto ezisetshenziswa kakhulu ze-polymer namuhla, umehluko wokusebenza kwe-polyurethane foam uvela kakhulu ekwakhiweni okuhlukene kwezakhiwo ze-pore. Nakuba i-closed-cell foam kanye ne-open-cell foam zinezakhi zamakhemikhali ezifanayo, zibonisa izakhiwo zomzimba ezihluke ngokuphelele ngenxa yomehluko kwisakhiwo esincane, okungahlukaniseki nokulawulwa okuqondile kwama-catalyst e-polyurethane.
Isici se-foam yamaseli avaliwe ukuthi ibhamuza ngalinye lizungezwe udonga oluphelele lwe-polymer ukuze kwakheke isakhiwo esincane esizimele nesivaliwe. Lesi sakhiwo sinikeza izinto ukusebenza okuhle kakhulu kokushisa (ukuqhuba ukushisa ngokuvamile kungu-0.018-0.028W/(m·K)) kanye namandla aphezulu omshini (amandla okucindezela angafinyelela ku-150-500kPa). I-foam yamaseli avulekile ifinyelela ukusebenza okuhle kwe-acoustic (i-NRC ingafinyelela ku-0.6-0.9) kanye nokuvuleka komoya (izinga lokugeleza komoya lidlula u-90%) ngenethiwekhi ye-pore exhunyiwe. Ukuqonda indlela yokwakheka kanye nomehluko wokusebenza kwala ma-foam amabili kubalulekile ekukhetheni kahle izinhlelo ze-catalyst kanye nokwenza ngcono izinqubo zokukhiqiza.
Indlela yamakhemikhali yokwakheka kwesakhiwo sembobo kanyei-catalystumthethonqubo
Indlela yokwakheka kwefoam yamaseli avaliwe
Ukwakheka kwesakhiwo samaseli avaliwe kuyinqubo yokulingana okuguquguqukayo, okuncike kakhulu kulezi zinto ezintathu ezibalulekile:
1. Izinga lokukhiqizwa kwegesi: linqunywa izinga lokusabela kwe-isocyanate namanzi (ukusabela kwegwebu)
2. Izinga lokuthuthukiswa kwamandla e-polymer matrix: linqunywa izinga lokusabela kwe-isocyanate kanye ne-polyol (ukusabela kwejeli)
3. Ukuqina kobuso: kugcinwa umphumela wokubambisana we-surfactant kanye ne-catalyst
Uma izinga lokusabela kwejeli lishesha ngokwanele, i-polymer matrix ingakha ifilimu yodonga enamandla anele ngaphambi kokuba ingcindezi yangaphakathi yebhamuza ifinyelele inani elibalulekile, ngaleyo ndlela igcine ama-pores engashintshi. Idatha yethu yokuhlola ikhombisa ukuthi ukusetshenziswa kohlelo olukhethekile lwe-catalyst kungakhuphula izinga lamaseli avaliwe kusuka ku-85% kuya ngaphezu kuka-95%, futhi i-coefficient yokushisa incishiswa ngo-15-20% ngokufanele.
Isimiso sokulungiselela igwebu elivulekile
Ukwakheka kwesakhiwo samaseli avulekile kuncike endleleni elawulwa kahle "yokuqhekeka kwefasitela". Uma kuhlangatshezwana nezimo ezilandelayo, udonga lwamaseli luzoqhekeka ngesikhathi ukuze lwakhe isakhiwo samaseli avulekile:
- Ukusabela kwejeli kuyabambezeleka, ukuze udonga lweseli luhlale luthambile ngesikhathi sokukhula
- Izinga lokukhiqizwa kwegesi kanye nezinga lokuthuthukiswa kwamandla e-polymer lifinyelela isilinganiso esifanele
- Ukucindezeleka kobuso kuncishiswa ngokufanele endaweni ebalulekile
Ngokulungisa isilinganiso se-amine catalyst kuya ku-metal catalyst, singalawula ngokunembile isilinganiso se-open-cell ngaphakathi kobubanzi obungu-80-98% ukuze sihlangabezane nezidingo ezahlukene zohlelo lokusebenza. Isibonelo, ama-acoustic foam ngokuvamile adinga isilinganiso se-open-cell esingaphezu kuka-92%, kuyilapho izinto zokuhlunga zingadinga isakhiwo se-open-cell ngokuphelele.
Isu lokukhetha nokwenza ngconoi-catalystuhlelo
Uhlelo olukhethekile lwe-catalyst lwe-foam yamaseli avaliwe
Ukukhiqizwa kwe-foam yamaseli avaliwe esebenza kahle kudinga ukulinganisela ukusabela okuthathu okubalulekile:
1. Ukusabela kwegwebu (ukukhiqizwa kwegesi): ama-catalyst e-triethylenediamine (TEDA) afana ne-MXC-102 avame ukukhethwa
2. Ukusabela kwejeli (ukwakheka kwe-polymer): Kunconywa uchungechunge lwe-octoate lwe-Stannous MXC-T12
3. Ukusabela kokulungisa (ukumelana nokushisa okuthuthukisiwe): Ama-catalyst akhethekile e-isocyanurate njenge-MXC-15
Ama-catalyst ahlanganisiwe ochungechungeni lwe-MXC-CF200 esiwakhile afaneleka kakhulu ekusetshenzisweni kwe-foam yamaseli avaliwe futhi anezici ezilandelayo:
- Izinga lamaseli avaliwe lizinzile ngaphezu kwama-93%
- Izinga lokushintsha kobukhulu <1.5% (70℃, amahora angu-48)
- Ukuhambisana okuphelele nama-ejenti okushaya i-HFO
- Landela amazinga okuvikela umlilo embonini yokwakha
Isixazululo esikhethekile se-catalyst se-foam evulekile
Isihluthulelo sokukhiqizwa kwe-foam yamaseli avulekile ukubambezela ukusabela kwejeli ngenkathi kuqinisekiswa ukuthi i-post-cure itholakele ngokwanele. Uchungechunge lwethu lwe-MXC-OF300 lunikeza:
- I-porosity evulekile elawulwa kahle (ingalungiseka ngo-85-99%)
- Ukuqina okuhle kakhulu (ukubuyela emuva kwebhola > 65%)
- Izici zephunga eliphansi (i-VOC < 50μg/m³)
- Ukuhambisana okuhle nezithiyo zomlilo
Kuyaphawuleka kakhulu ukuthi i-catalyst yethu entsha ye-MXC-OF350 ifinyelela ukulawula okunembile kwesakhiwo seseli elivulekile ngokusebenzisa indlela eyingqayizivele yokuqalisa ukusebenza ebambezelekile, ixazulula ngempumelelo inkinga yesici seseli elivaliwe esivame ukubonwa kuma-foam aqinile.
Izitayela zokuthuthukiswa kobuchwepheshe kanye nezixazululo ezintsha
Njengoba kunemithethonqubo eqinile yezemvelo kanye nezidingo ezahlukahlukene zokusetshenziswa kwe-terminal, ubuchwepheshe be-polyurethane catalyst bubhekene nezinselele ezintsha namathuba:
1. Uhlelo lwe-foam olusebenzisa ukushisa okuphansi kakhulu:
- Thuthukisa ama-catalyst afanelana kahle nesizukulwane esisha sama-ejenti okushaya umoya we-HFO
- Ubuchwepheshe be-Nanocomposite catalytic buthuthukisa ubuqotho bamaseli avaliwe
- Inhloso yokuqhuba ukushisa: <0.018W/(m·K)
2. Ubuchwepheshe be-foam obuhlakaniphile obusebenzisa amaseli avulekile:
- Ukulawulwa kwe-gradient open porosity (i-porosity ehlukene ezindaweni ezahlukene)
- Uhlelo lwe-catalyst olusabela kahle emvelweni
- Isihluthulelo se-foam esivulekile esingasetshenziswa kabusha
3. Izixazululo ezikhuthazayo ezisimeme:
- Ukuthuthukiswa kwe-catalyst okusekelwe ku-bio
- Uhlelo lokukhipha i-VOC ephansi
- Ubuchwepheshe bokuphola obuphansi (ukonga amandla okungaphezu kuka-30%)
Usekelo lobuchwepheshe kanye nezinsizakalo
Sinikeza ukwesekwa okuphelele kobuchwepheshe kubakhiqizi be-polyurethane emhlabeni jikelele:
- Isevisi yokuhlola elebhu: nikeza umbiko wokuhlolwa kokuqala zingakapheli amahora angu-72
- Ukwenziwa ngcono komugqa wokukhiqiza: isiqondiso sobuchwepheshe esizeni kanye nokulungiswa kwenqubo
- Ukuthuthukiswa ngokwezifiso: ukuthuthukisa uhlelo olukhethekile lwe-catalyst ngokuya ngezidingo ezikhethekile
- Ukuqeqeshwa kobuchwepheshe: Bamba njalo amaseminari obuchwepheshe be-foam kanye nokusetshenziswa kwe-catalyst
Ukuze uthole ulwazi oluningiliziwe lobuchwepheshe noma ukufaka isicelo sokuhlolwa kwesampula yamahhala, sicela uxhumane nethimba lethu lobuchwepheshe ngezindlela ezilandelayo:
- Email: info@mingxuchem.com
- Iwebhusayithi: https://www.mingxuchem.com/
Ukukhetha uhlelo olufanele lwe-catalyst kuyisinyathelo esibalulekile ekwenzeni ngcono ukusebenza kwe-foam kanye nokuthuthukisa ukusebenza kahle kokukhiqiza. Masisebenzisane ukukhuthaza intuthuko entsha yobuchwepheshe be-polyurethane foam.
Isikhathi sokuthunyelwe: Meyi-06-2025